Career
At the age of 18 he entered the Resurrectionist Order in Lwow (today Lviv, Ukraine). In 1890, he moved to the United States. In 1893, after the assassination of Carter Harrison, Senior, the mayor of Chicago, he invented the first commercial bulletproof vest.
In 1897, he improved it together with January Szczepanik who was the inventor of the first commercial bulletproof armour in 1901.
lieutenant saved the life Alfonso XIII, the King of Spain - his carriage was covered with Szczepanik"s bulletproof armour when a bomb exploded near lieutenant In his early 20s he began experimenting with the cloth, using steel shavings, moss, hair.
In his research, he came upon the work of Doctor George East. Goodfellow, who had written about the bullet resistive properties of silk. All early experiments produced an inflexible cloth which was more in the nature of a coat of chainmail.
After the assassination of Mayor Carter Harrison, Zeglen renewed his efforts to find a bulletproof material and determined to use silk.
In his mid 30s he discovered a way to weave the silk, to enable it to capture the bullet, while visiting weaving mills in Vienna, Austria, and Aachen, Germany. A 1⁄8 in (3175 mm) thick, four ply bulletproof vest produced there was able to protect the wearer from the lower velocity pistol bullets of that era. Zeglen himself submitted to a test in Chicago.
He put on a vest of the material and an expert revolver shot fired at the vest at eight paces and not one of the bullets disturbed Zeglen.
The weight of the fabric was 1⁄2 lb (023 kg) per sq ft (0093 m²).
